搜题请搜索小程序“爱下问搜题”
问题 单项选择题

HCN的解离常数Ka=4.9×10-10，0.010mol·L-1的HCN溶液，其解离度为（）。

A.2.2×10-4

B.0.022%

C.2.2×10-5

D.0.0022%

答案

参考答案：B

解析：

句型转换

按要求改写句子。

1. It is about four and a half hours from Fukang to Ununqi by bus. (对划线部分提问)

    __________ from Fukang to Unmnqi by bus?

2. This new computer belongs to Daniel. (对划线部分提问)

    __________ this new computer __________?

3. There were many students in this school last year. (改为否定句)

    There ___________ many students in this school last year.

4. The kid is playing the piano at the school music club. (对划线部分提问)

    ___________ is the kid ___________ the piano?

5. More and more people speak Chinese in the world. (改为被动语态)

   Chinese ____________ by more and more people in the world.

6. 他太累，在公交车上睡着了。 (完成译句)

    He was ____________ tired ____________ he fell asleep on the bus.

查看答案
单项选择题 A3/A4型题

男，28岁，转移性右下腹疼痛24小时，麦氏点压痛、反跳痛，右下腹肌紧张，白细胞15×109/L.中粒性细胞90%，诊断为急性阑尾炎，拟急诊手术。

手术前最主要的护理措施是（）

A．补充血容量

B．右下腹皮肤准备

C．肥皂水灌肠通便

D．半卧位，应用抗生素

E．12小时禁食，4小时禁饮
查看答案